Type of Variable 0 Type of Variable 0

Type of variable
Bambang Subali
Biological Edu Dept

The Type of Variable
a. Independent variable: variable influence
or have effect on dependent variable
b. Dependent variable: variable influenced
or give response to independent variable
c. Antecendent variable: variable influence
on independent variable
d. Random variable: variable does not
influence on dependent variable
e. Moderator variable: variable influence on
independent and dependent variables

The Kind Of Variable
f. Suppressor /nuisance/extraneous/variable: variable
besides on independent variable which influence
on dependent variable
This variable must be controlled become random

variable/control variable
In the research method, these variables must be
described explicitly on procedure
g. Substitute variable/observation: replacer
variable/observation of dependent variable if the
dependent variable is difficult to be observed
h. Covariate variable/concomitant variable/covariable: suppressor variable that uncontrollable, but
it must be collected and calculated in data analysis

THE INFLUENCE OF PHOSPHATE FERTILIZER CONSENTRATION ON
THE PRODUCTIVITY OF CORN SEED
i. IND VAR : PHOSPHATE FERTILIZER CONSENTRATION  AS FACTOR
DECLARE THE NUMBER OF FACTOR LEVEL  3 LEVEL IN LABORATORY
EXPERIMENT: 0 G/POLYBAG, 2 G/POLYBAG, 4 G/POLYBAG , OR
4 LEVEL IN FIEPD EXPERIMENT: 0 KG/HA, 10 KG/HA, 20 KG/HA, 30
KG/HA
II. DEP VAR (AS PRIMERY OBSERVATION ): PRODUCTIVITY OF CORN
SEED CAN BE MEASURED (WITHOUT SUBSTITUTE
OBSERVATION/PARAMETER)
III. SUPPRESSOR VAR :

A. FROM OBJECT
1. VARIETY OF CORN  MENTION THE VARIETY OF CORN IN THE
RISEARCH TITTLE
2. VIABILITY OF CORN SEED  DECLARE THE VIABILITY OF CORN SEED
IF THE EXPERIMENT STARTED BY PLANTING THE SEED (OR DECLARE
THE SEEDLING SIZE  THE HEIGHT OF SEEDING IF EXPERIMENT
SRARTED IN THE SEEDLING CONDITION)

B. MEDIA
1. MEDIA DETERMINED BY LOCATION  DECLARE LOCATION OF
EXPERIMENT (WONOSARI  LIME SOIL , , PONTIANAK  PEAT SOIL)
2. LABORATORY EXPERIMENT
a) MEDIA
1) SOIL TYPES  DECLARE THE SOIL TYPE IN THE RESEARCH
PROCEDUR
2) ADDITIONAL DROPSY FERTILIZER  DECLARE THE ADDITIONAL
DROPSY FERTILIZER ON THE SOIL
3) THE SOIL HOMOGENITY  DECLARE THE SOIL WAS MIXED IN
ORDER TO HOMOGEN
4) POLYBAG SIZE  DECLARE THE VOLUME OR DIAMETER OF POLY

BACK
5) THE SOIL VOLUME  DECLARE THE SOIL VOLUME IN EACH
POLYBACK
6) DAILY ADDITIONAL WATER  DECLARE ADD WATER UNTIL THE
SOIL BECOME SATURATED.
C. CLIMATIC FACTOR
1. FILED EXPERIMENT
DETERMINED BY MONTH OF EXPERIMENT IS IMPLEMENTED)
2. LABORATORY EXPERIMENT

D. MEDIATOR VAR
a) AS EXPLANATORY VAR (IF DATA WERE
COLLECTED)  DRY WEIGHT OF ROOT, STEM
AND LEAFS
b) AS INTERVENING VAR (IF DATA WERE NOT
COLLECTED  TO DESCIBE ON THE LITERATURE
SUTDY)  THE CON SENTRATION OF PHOSPHATE
ON THE SOIL AFTER FERTILIZATION, INTENSITY
OF ROOT ABSORBSION, INTENSITY OF
METABOLISM PROCESSES, LOCATION OF

DEPOSITION OR ACCUMULATION THE
METABOLISM RESULT
D. RANDOM VARIABLE  EXAMPLE: SEX OF
RESEARCER, UNIFORM OF RESEARCHER, SIZE OF
VERTILIZER CONTAINER,

THE INFLUENCE OF THE LENGTH EXPERIENCE USING
THE MASK WITHOUT STRAP IN THE TRADITIONAL
DANCING ON THE SLOPE OF THE INCISOR TEETH

Indep. Var
:?
Dep. Var : ?
Suppressor Var: ?
Moderator var: ?
Mediator var  Explanatory and intervening var?